In closed circuit grinding as compared to open circuit grinding, the
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In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is
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Specific surface area is the surface area of a unit __________ of materials.
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Colloidal mills are used for __________ grinding.
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Cyclones are used primarily for separating
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For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter)
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For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (Np) varies with NRe as
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The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)
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Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)
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Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)
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The critical speed of a trommel (N) is related to its dia (D) as
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Cartridge filters are termed as 'edge' filters, because of the fact that the
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Two particles are called to be equal settling, if they are having the same.
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If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the
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The capacity of a classifier in 'tons of solid/hr' is given by (where, A = cross-sectional area, m2, V = rising velocity of fluid, m/sec, S = percentage of solids in the suspension by volume, ρ = density of solids, kg/m3)
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The specific surface of sherical particles is proportional to (where, Dp = diameter of particle).
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Wet grinding in a revolving mill __________ as compared to dry grinding.
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Trommels employ __________ for screening of materials.
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Run of mine (ROM) coal is crushed by a __________ for use in domestic ovens.
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increasing the capacity of a screen __________ the screen effectiveness.
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